Added my implementation of unixtime.

This implementation has very few reasonable code (call atol() and ctime()),
but has some nice standard program stuff (parse options, print help, ...).

configure.macros

@@ -0,0 +1,35 @@
+# configure.macros
+
+# Directories
+PREFIX="/usr/local"
+BINDIR="@PREFIX@/bin"
+SBINDIR="@PREFIX@/sbin"
+MANDIR="@PREFIX@/share/man"
+MAN1DIR="@MANDIR@/man1"
+MAN2DIR="@MANDIR@/man2"
+MAN3DIR="@MANDIR@/man3"
+MAN4DIR="@MANDIR@/man4"
+MAN5DIR="@MANDIR@/man5"
+MAN6DIR="@MANDIR@/man6"
+MAN7DIR="@MANDIR@/man7"
+MAN8DIR="@MANDIR@/man8"
+MAN9DIR="@MANDIR@/man9"
+
+# Programms
+CAT="cat"
+CC="cc"
+CP="cp"
+GZIP="gzip"
+INSTALL="install"
+RM="rm"
+SHELL="/bin/sh"
+STRIP="strip"
+TAR="tar"
+ZCAT="zcat"
+
+# Magic macros
+# @CFILE@ will be expanded to the name of the file, that will be created.
+# Also the current template name (e.g. @Makefile.in@) can be used as a macro
+# that will be expanded to another macro named CTEMPLATE (which can be 
+# defined here or will default to a buildin text).
+#end